Power pumps



Deu 20, l1955 H. K. PINKERTQN 727,469

POWER PUMPS Filed Sept. 26, 1952 3 Sheets-Sheet 2 Dec. 20, 1955 H. KPINKERTON 2,727,469

POWER PUMPS Filed Sept. 26, 1952 5 Sheets-Sheet 3 United States Patent()POWER PUMPS Howard K. Pinkerton, Quincy, Ill., assguor to Gardner-Denver Company, Quincy, lll., a corporation of Delaware ApplicationSeptember 26, 1952, Serial No. 311,590

2 Claims. (Cl. 10S-202) My invention relates to improvements in powerpumps and is more particularly directed to that type of pump intendedfor use in oil, mining or industrial operations, wherever moderatelyhigh pressures are required.

My invention is adapted particularly to a structure whereby rigidity isgiven to the frame of the unit and a more satisfactory assembly is'provided, rendering replacement and renewal of parts economically andwith little effort. The main shaft may be removed and a new oneinstalled without removing the eccentric and gears from the frame.Similarly, the bushings in the eccentric can be examined or removed andreplaced without removing the eccentric from the frame. Another objectof the invention is to provide improved means for holding the ends ofthe shaft in the frame.

Another object of the invention is to provide improved means forsupporting the ends of a main shaft upon which certain elements rotatefor driving the pump.

Still a further object of the invention is to provide a rigid shaft uponwhich certain eccentrics and gears rotate, with improved means forlocking the ends of the shaft to the frame.

Further objects of the invention will hereinafter appear, and to all ofthese ends the invention consists of the features of construction,arrangement of parts, and combination of elements, substantially ashereinafter fully described and claimed in the specification and shownin the accompanying drawings, in which: Y

Figure l is a vertical sectional view taken longitudinally through apumping unit, showing the power end and the pumping or uid end.

Figure 2 shows one method of mounting the main shaft Within the sidewalls of the frame enclosing the power end.

Figure 3 is a perspective view of one of the bearing elements for theshaft end.

Figure 4 is a perspective view showing a tapered sleeve which ts uponthe shaft end and within the element shown in Figure 3, and

Figure 5 is a sectional view taken through the power end of a largerpumping unit, vshowing another method of mounting the main shaft in theside walls of the frame.

Briey the invention herein about to be described is an improvement inthe method of mounting a main shaft in the side walls of a power pump.Heretofore such shafts have been of the revolving type, supported bytapered or roller bearings, positioned within the side walls of the pumpframe. The result being that longitudinal movement, to a certain degree,of the shaft is permitted with respect to the bearings, thus creating ageneral spreading action between the side walls, causing misalignment ofthe shaft and the elements associated therewith.

The present invention provides means for rigidly mounting each end of adriven shaft in the side walls of a frame forming a positive supportupon which the V2,727,469 Patented Dec. 20, 1955 ICC eccentric and gearrotate, eliminating the possible longitudinal movement of the shaft andlikewise the spread of the frame.

With these and other objects in view, numeral 1 indicates the side of asupport or skid upon which the pumping unit is mounted, the unitincluding a fluid end 2 and a power end 3.

The fluid end 2 includes a cylinder block having suitable inlet andoutlet valves, one of which is shown at 4 and a cylinder lining 5 inwhich is positioned for reciprocation a piston 6 having a rod 7connected to a crosshead 8.

Movement of the piston 6 within the cylinder 5, will, of course, drawliquid or semi-liquid material in the cylinder and force the same outunder high pressure to its point of use. Such a structure is well knownin the art and it is therefore deemed unnecessary to show and describein detail the full structure involved, inasmuch as the invention doesnot reside therein.

The power end of the pump includes a frame structure having side walls 9in which are supported certain shafts hereinafter set forth. The frameincludes a removal cover 1G for access to the working parts of the powerend.

The power end includes a main shaft 11, the ends of which are rigidlysupported against movement in suitable housings 12, formed within theside walls 9 of the frame. Also positioned within the side walls of theframe are the ends of a rotating jack shaft 13, supported upon suitableroller bearings 15 held within a removable cap 16 bolted to each sidewall. One or both ends of the shaft may extend through the cap 16 forthe reception of a driving gear or the like, not shown, to whichoperating force is delivered from a suitable power unit.

The jack shaft 13 carries one or more gears 17 formed integrallytherewith or rigidly connected thereto and which are adapted to meshwith corresponding gear rings 18, detachably connected to hubs 19rotatable about the fixed main shaft 11. Each gear hub 19 is provided onone of its faces with an eccentric 20 about which is positioned a ring21 of a connecting rod 22, the free end of the rod being pivotailyconnected to the crosshead 8.

All of the foregoing is common in any pumpingunit of a class referred toregardless of size or volume. The present improvement residing in themethod and means for mounting the ends of the main shaft within the sidewalls of the frame, for the purpose previously set forth and hereafterapparent.

Referring to the drawings, particularly Figure 2, it will be observedthat the gear hub 19 and eccentric 20 have pressed therein a bushing 23which forms a removable bearing for the reception of the main shaft 11.

To prevent longitudinal movement of the bushing 23 and the hub 19 withrespect to the shaft 11, there is fitted over each end of the shaft athrust bearing ring 24, the inner vertical face of which might beengageable with the eccentric 2!) and bushing 23 tending to hold thesame in proper position upon the shaft 11 and the gear ring 18 in itsproper relation with its rJo-acting gear 17 carried by the shaft 13. Theperiphery of the ring 24 has a plurality of outwardly extendingprojections or fingers 25 against which a suitable tool might be placedto rotate the ring upon the shaft 11 for a purpose hereinafterdescribed.

As shown in Figure 2, the ring 24 has locked to its outer face, by aremovable stud bolt 26, a threaded nut or ring 27 for engagement with asecond threaded ring 28 fitted snugly within the housing 12 and heldagainst rotation by a locking pin 29 hereinafter described.

Thus it will be apparent that by placing a tool or the like against anyone of the projections 25 of the ring 24, the ring 24 may be rotatedwith respect to the shaft 11. When rotated the threaded ring 27 lockedthereto will rotate and move inwardly or outwardly with respectL:entraine 3 tothe rin'g 28,-'n1ovin`g "the bearing ring 24 to itsproper position between the end of -thehousing v12 andthe eccentric 20.

To support the ends of the shaft 11 within the housing "1-2',"`foned infopposite vertical walls ofthe frame 9, Aeach 'endof the s'ha'ft'haspressed thereon a collarf'lai), the outer periphery of which taperstoward its outer end or the 'end in ilang'el which 'abuts the end ofltheshaf-t 11 preventing furtherl longitudinal lrnov'ernentof the collarupon ythe shaft end.

-Shown inFigure 4, the collar 30 is provided with a longitudinal slot 32extending 'from 4one end face to the other v'and `through the '-ange 31,the purpose being to permit expansion fof the collar when pressing the*same upon the shaft end. The collar 30 is further provided with'holesor p'assagewa'ys 34 through which may pass a locking lbolt-36threadedly connected to the adjusting nut 27. Thusitwill 1ibe lapparentthat when the thrust plate or'rin'g 24 is'adjnsted Withrespect to thehub and bushing, and Within thefiixe'd threaded ring 28, the plate 24-may'be locked -in'its=desire`d position bythe bolt 36.

Fitted within the housing 12 is a ring 38 provided at each endYwith'diarnetrically opposite slots 39, permitting 'expansion' andcontraction of the ring with respect to the housing 12 and 'the collar30 over which the ring 38 is positioned for movement. VIt will be notedthat the inner face yof the ring 38 tapers correspondingly with thecoacting tapered periphery of the collar 30. The inner end face of theYring 38 is provided with a socket 33 to receive the extending end ofthe llocking-pin 29 Xed within the adjacent face of thestationarythreaded ring 28. Such a structure permits longitudinal movement of thering 38 with respectto its feo-acting elements but prevents rotarymovement of Vleither the ring 38 or threaded ring 28. Thus anyinwa'rdmovement of thering 38 upon the collar 30 will cause a wedging 'actionrbetween the collar and the'housing 12locking rigidly the shaft 11 tothe sidewall 9 and at the same `time preventing any longitudinal orrotary movement of the shaft.

The outer 'end 'fa'ceof the ring 38 carries a plurality of threadedsockets 40 for the reception of stud bolts'f41, securing to the ring 38an end plate 42. The plate 42 is locked against movement with respect tothe shaft end by a stud bolt-43 passing through the plate and threadedlyreceivablewithin a socket formed in the end of the shaft. 'From 'this-structure it Vwill -be apparent that Vby turning the 'threaded s'tudbolt 43 in -one direction, the wedging ring 38`Will be forced inwardlyof the housing i2, locking rtuly'thereto the shaft'end. If desired,additional stud bolts 43 may be provided to equally distribute thewedging Aforce to all areas of `the ring 38.

It will be further notedthat lthe plate 42 supports the outer 'end ofl:the ladjusting vbolt 36 which is threadedly connected to the nut 27serving t0 lock the same against movement.

The 'plate 42 supports a lubricating conveying tube 44, the inner-end'of -Which communicates vwith a passageway 45 formed within 'the `shaftend and leading to one end of the rotatable :bushing 23 pressed with thehub 19 and eccentric 20. The outer end of the tube 44'is locked'to 4 aremovable plate 46 closing the housing 12 and forminglaweover-fer-thefsnpportingelementsof -thev-shaft-vtherein.

Referring to Figure 5 itfwill be observed that all of the elements ofthe pumping unit previously described, are present with the exception ofthose forming the means for locking the shaft within the housing 12 ofthe ,side walls 9. Shown in this `structure the pump includes aplurality of ring gears 18 and eccentrics 20 rotatable upon the fixedshaft 11, the"'en}sof`Which are tapered and havepressedjthere0n-atapened ring -55 .keyed to the shaft as indicated atISG and-alsokeyed-.to the housing 'as indicated at S3. The collar ismaintained within the housing 12 and upon the tapered end of the shaft11 by an end plate 57 rconnectetlto'the 'shaft "by the `stud lbolt orA'bolt S8' and to the outer face' fof the-collar by-Astuds 59. Thus itwill be apparent that by tightening the stud bolt 58, the plate will bemoved inwardly toward the shaft end and at the same time forcing thetapered ring within the housing 12 and upon the tapered end of theshaft. Thus a rigid structure isprovidedrfor-"supporting' .the shaft v11against longitudinal'fand rotaryrfmove'ments with respect to 'theside'fwalls.

F rom fthe foregoing, ,it is thought that the construction, operationland many-:advantages -of the herein described invention 'willbe=apparent-to those skilled in the art without'further-description,aand'it will `be understood that various=changesfinAthe size, shape, proportion and minor details of'construction may -beresorted to without departing from the spirit :or lsacrificing Aany ofthe advantages of the invention.

What-I claim, is:

l. vA 'unit'of'v the Yclass described-including ya frame, a shaftsupported bythe frame `and :having rotatable thereon a gear andeccentric, means rigidly connecting the shaft lto fthefframe-includingfagpair of relatively movable tapered -ringsfan adjusting ringrotatable about the shaft holding the gearfandeecentric againstlongitudinal movementthereof, and-meanslockingdhe adjusting ring againstmovement with .respectv'to the tapered rings.

'-2. Avtunit of the class`=described including 'a frame, a shaftsupported by the frame and having rotatable thereon a'gear :and,eccentric, a pair of relatively movable tapered rings; one 4engagingthe V-shaft -and the other A`the -frameholding the shaftagainstmovement, an ladjusting ring rotatable about itheshaft ymaintaining thegear and eccentric against longitudinal movement thereof, and meanslocking the adjusting ring and tapered rings against movement -one vwithrespect -to'the other.

References Cited in the vfile tof lthis `patent UNITED STATES PATENTS`989,775 Fraser- '.Apr. 18,.:1911 1,068,148 Lyon et al July 22, 19131,3785091 Carlsen May 17, 1921 2,540,656 vCourtot Feb. 6, 19.51.2,654,326 Sheen -etal. Oct; 6, 1953 2,680,633 'Brown .`une`8,l 1954FOREIGN PATENTS 260;486 Switzerland July 16, 1949

